Calculated Glider Drags at Different Speeds and Gee Loads
Glider Specs:
Best L:D 40  Drag @ Best speed & 1 gee
 @ Speed of 100 Induced Drag 10
Weight 800 Friction Drag 10
Stall Speed 60 Negative Gee Drag Factor 1.4
Inverted Stall Speed 90 Chart Gee Start -3
Chart Speed Increment 25 Chart Gee Increment 0.5
Drag Chart:
Speeds --> 50 75 100 125 150 175 200 225
Gee Load v
-3 STALL- STALL- STALL- STALL- STALL- 84.0 87.5 95.8
-2.5 STALL- STALL- STALL- STALL- 70.4 71.4 77.9 88.2
-2 STALL- STALL- STALL- STALL- 56.4 61.2 70.0 81.9
-1.5 STALL- STALL- STALL- 42.0 45.5 53.2 63.9 77.1
-1 STALL- STALL- 28.0 30.8 37.7 47.4 59.5 73.6
-0.5 STALL- 14.1 17.5 24.1 33.1 44.0 56.9 71.6
0 3.5 7.9 14.0 21.9 31.5 42.9 56.0 70.9
0.5 12.5 10.1 12.5 17.2 23.6 31.4 40.6 51.1
1 STALL+ 23.4 20.0 22.0 26.9 33.9 42.5 52.6
1.5 STALL+ 45.6 32.5 30.0 32.5 38.0 45.6 55.1
2 STALL+ STALL+ 50.0 41.2 40.3 43.7 50.0 58.5
2.5 STALL+ STALL+ 72.5 55.6 50.3 51.0 55.6 63.0
3 STALL+ STALL+ STALL+ 73.2 62.5 60.0 62.5 68.4
3.5 STALL+ STALL+ STALL+ 94.0 76.9 70.6 70.6 74.8
4 STALL+ STALL+ STALL+ 118.0 93.6 82.9 80.0 82.2
4.5 STALL+ STALL+ STALL+ STALL+ 112.5 96.7 90.6 90.6
5 STALL+ STALL+ STALL+ STALL+ 133.6 112.3 102.5 100.0
5.5 STALL+ STALL+ STALL+ STALL+ 156.9 129.4 115.6 110.4
6 STALL+ STALL+ STALL+ STALL+ 182.5 148.2 130.0 121.7
6.5 STALL+ STALL+ STALL+ STALL+ STALL+ 168.6 145.6 134.1
7 STALL+ STALL+ STALL+ STALL+ STALL+ 190.6 162.5 147.4
7.5 STALL+ STALL+ STALL+ STALL+ STALL+ 214.3 180.6 161.7
8 STALL+ STALL+ STALL+ STALL+ STALL+ 239.6 200.0 177.0
Notes:  Units can be varied, though Lbs and feet / second could represent a modern 1 seater.
Friction drag assumed proportional to speed squared
Induced drag assumed proportional to lift squared and inverse to speed squared
Taras K  April 2002